A hazard Drexler already foresaw in Engines of Creation, in which he outlined the possibilities and consequences of this emerging field.
If general purpose disassemblers got loose in the environment and started
DISASSEMBLING EVERY MOLECULE THEY ENCOUNTERED
(CONSUME) until there is nothing left, the planet would need to be quarantined.
The Astronaut is not waving hello, but what if it is a warning of quarantine?
